Silicon Carbide  Heating Rod

made from high-density, high-purity silicon carbide, which is the most popular type of economical heating element capable of operating under hot and rigorous environments.

Main Specifications:

Maximum Working Temperature

1450oC  

Order sample:

d=8mm,D=14mm, HZ=150mm, CZ=100mm, OL=350mm, Resistance=1.5ohms.
Please specify as: dia8/14x150x350mmx1.5ohms

When you place order, please tell us following data:

a.Outer diameter (OD)
b.Length of Hot zone (HZ)
c.Length of Overall (OL)
d.Resistance (at 1050oC+/-50oCoCoC)

Specification and Range of Resistance:

Dia(OD) (mm)

Length of hot zone(HZ)(mm)

Length of cold zone(CZ)(mm)

Overall Length(OL)(mm)

Range of Resistance(Ω) (ohms)

8

100-300

60-200

240-700

2.1-8.6

12

100-400

100-350

300-1100

0.8-5.8

14

100-500

150-350

400-1200

0.7-5.6

16

200-600

200-350

600-1300

0.7-4.4

18

200-800

200-400

600-1600

0.7-5.8

20

200-800

250-600

700-2000

0.6-6.0

25

200-1200

250-700

700-2600

0.4-5.0

30

300-2000

250-800

800-3600

0.4-4.0

35

400-2000

250-800

900-3600

0.5-3.6

40

500-2700

250-800

1000-4300

0.5-3.4

feature

The silicon carbide heating element is a kind of non-metal high temperature electric heating element. It is made of selected super quality green silicon carbide as main material, which is characterized by high-applied temperature, anti-oxidization, anti-corrosion, long service life ,little deformation, easy installation and maintenance. It is widely used in various high temperature electric furnaces and other electric heating devices ,such as in the industries of magnet, ceramics, powder metallurgy, glass, metallurgy and machinery etc.                                                                                                                                                                                We adopt new production process of cold ends, so our SIC heating elements have excellent specific rate of heat zone resistance and cold end resistance, to avoide over-temperature of cold ends to damage the furnace body.

Antioxidant property of elements

The element start to being oxidized when heat to 800C in air,and a SiO2 protect film will be generated in surface of hot zone when temperature get to 1000-1300C ;cristobalite will be crystallized at 1300C; the protect film get to a certain thickness when the temperature get go 1500C which make the oxidation speed being very slowly to stable.if continue to heat to over 1627C ,the protect film will be damaged and oxidation speed will be more rapid evidently and make the element damaged earlier.                                                                                                                                                   Thought the element will be oxidized very slowly in course of application,it also will make the resistance increased following long time application,this phenonenon calls ageing ,in order to lower the ageing speed,we use special technology to spread a protect film on the surface of hot zone in the course of production,which enhance the Antioxidant property of element evidently and lengthen the service life.

Electric property of elements

SIC heating elements has rather large specific resistance .when it is heated in air and the surface temperature of the hot zone reaches 1050C,it's resistance rate is 600-1400 mm2/mm ,its resistance value changes as the temperature rises.From room-temperature to 800Cis negative value ,over 800Cis positive value nature curve.